Here's what I do.
1). Clear the area around you. I use the kitchen table. Make sure there are no 'linty' things laying near. Wipe the table down, that sort of thing.
2). Have your clean microfiber cloth there and some scotch tape handy.
3). Clean your screen thoroughly. I wet one tip of the cloth, wipe the screen throughy, dry with the other end. It's important to use a cloth that doesn't carry lint. This is where most folks go wrong. A nice, clean, microfiber works best. But making sure it doesn't have any lint is the key.
4). Take out your PS protector. Peel down the end that goes on the Home Button. Only peel down an inch or two. Line everything up and then slowly begin to unroll the backing it and laying it on the screen, smoothing as you go. IF you see any lint, lift the screen protector and touch the lint with the tape.
I've been putting screen protectors on since 2004 or so and PS are by far the easiest to use. I put my last one on in about 30 secs. The key is to set everything up first, and have a really good cloth. Just take your time, you'll get it on.